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A Poisson Stochastic Frontier Model with Finite Mixture Structure
Drivas, Kyriakos; Economidou, Claire; Tsionas, Efthymios G. - Volkswirtschaftliche Fakultät, … - 2014
Standard stochastic frontier models estimate log-linear specifications of production technology, represented mostly by production, cost, profit, revenue, and distance frontiers. We develop a methodology for stochastic frontier models of count data allowing for technological and inefficiency...
Persistent link: https://www.econbiz.de/10011107340
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Spatial Aspects of Innovation Activity in the US
Drivas, Kyriakos; Economidou, Claire; Karkalakos, Sotiris - Volkswirtschaftliche Fakultät, … - 2014
This paper studies the effects of spatial concentration of innovation activity on local production of patents in the US …. In doing so, we augment the standard knowledge production function with a structure that allows for spatial effects … the important role of state’s own R&D stock and human capital in producing new inventions. In addition, external knowledge …
Persistent link: https://www.econbiz.de/10011109873